How to Obtain the Identifier Number (UDID) for Your iPhone

Obtaining your iPhone’s Unique Device Identifier (UDID) is a straightforward process that requires just a few steps. You’ll need access to a computer with iTunes and your iPhone’s charging cable. After completing the process, you’ll have your device’s UDID, which is essential for various tasks such as beta testing apps or diagnosing issues with Apple support.

After obtaining the UDID, you can use it for app development, beta testing, or technical support with Apple. It’s a unique 40-character alphanumeric string that acts as your iPhone’s fingerprint.


The Unique Device Identifier, or UDID, is a crucial element for iPhone users, especially those involved in app development or those seeking personalized technical support. It’s a 40-character string that is unique to each iPhone and is used by developers and Apple to associate a device to a user’s account for various purposes, including app development, beta testing, and specific software installations.

Knowing how to retrieve your iPhone’s UDID is essential, particularly for those who frequently engage with non-public apps or require unique device support. This information is pertinent to developers who need to register devices for app testing, IT professionals who manage company devices, or users who require personalized support from Apple. Although the process is not complex, it’s not as straightforward as checking your phone settings. You’ll need access to a computer with iTunes installed for the task at hand. Let’s walk through the steps to get your UDID without any hassle.

Step by Step Tutorial: Obtain the UDID for an iPhone

The following steps will guide you through obtaining your iPhone’s UDID. You’ll need a computer with iTunes and your iPhone.

Step 1: Connect your iPhone to your computer

Connect your iPhone to your computer using your charging cable.

Connecting your iPhone to your computer with the charging cable will allow iTunes to access your device’s information. Make sure your iPhone is unlocked and that you trust the computer if prompted.

Step 2: Open iTunes

Open iTunes on your computer.

Once your iPhone is connected, open iTunes. You may need to update to the latest version if prompted.

Step 3: Find your iPhone’s details page

Click on the device icon in iTunes to access your iPhone’s details page.

Clicking the device icon will take you to a summary page where you can see various details about your iPhone, including its name, capacity, and serial number.

Step 4: Reveal the UDID

Click on the ‘Serial Number’ label to reveal the ‘UDID’.

In the summary page, you’ll find the serial number of your iPhone. Clicking on this label will switch the display to show your iPhone’s UDID.

Step 5: Copy the UDID

Right-click on the UDID and select ‘Copy’ to copy it to your clipboard.

After the UDID is displayed, right-click on it and select ‘Copy’ to copy it to your clipboard. You can then paste it wherever you need to use it.


Unique IdentificationThe UDID serves as a unique identifier for your iPhone, which is extremely useful for app developers and for obtaining personalized support from Apple.
SecurityThe UDID is unique to each device, providing an additional layer of security when registering devices for development or support purposes.
TroubleshootingProviding your UDID to Apple support can streamline the troubleshooting process, making it easier to diagnose and fix issues specific to your device.

Having the UDID of your iPhone can be a powerful tool, particularly for those in the development or IT field. It allows for a more tailored experience when interacting with Apple’s services and can be the key to unlocking additional support and features.


Privacy ConcernsThe UDID is a unique identifier, which means it could potentially be used to track your device’s activity or personal information if it falls into the wrong hands.
Limited AccessibilityThe UDID cannot be accessed directly from the iPhone’s settings and requires the use of iTunes and a computer, which may not be convenient for all users.
MisuseIf shared recklessly, the UDID could be misused for unauthorized app installations or unwanted tracking, so it’s crucial to share it only with trusted sources.

While having access to your iPhone’s UDID can be beneficial, it’s important to treat this information with care and be mindful of the potential risks associated with sharing it.

Additional Information

When dealing with the UDID, it’s essential to note that this number is specific to your device and should be treated as sensitive information. Be cautious of where and with whom you share your UDID, as it could be misused if it falls into the wrong hands. Additionally, while the process of obtaining the UDID through iTunes is relatively simple, it might not be the most convenient method for everyone. There are alternative tools and software available that can also retrieve your iPhone’s UDID without the use of iTunes, but these options should be approached with caution and research to ensure they are legitimate and secure.

It’s also worth noting that the UDID is not the same as your device’s IMEI or serial number, which are used for different purposes such as identifying your device on a cellular network or for warranty purposes. The UDID is primarily used for app development and personalizing your support experience with Apple. If you’re working with a developer or need to provide your UDID for technical support, ensure you’re following the proper channels and that your privacy is protected.


  1. Connect your iPhone to your computer.
  2. Open iTunes.
  3. Find your iPhone’s details page.
  4. Reveal the UDID.
  5. Copy the UDID.

Frequently Asked Questions

What is a UDID?

A UDID, or Unique Device Identifier, is a 40-character alphanumeric string that is unique to each iPhone.

Why do I need my iPhone’s UDID?

Your UDID is needed for app development, beta testing, or for personalized technical support from Apple.

Can I obtain my UDID without iTunes?

Yes, there are third-party tools available that can retrieve your UDID without iTunes, but be sure to use trusted and secure software.

Is it safe to share my iPhone’s UDID?

You should only share your UDID with trusted individuals or organizations, as it is a unique identifier that could potentially be misused.

Can I find my UDID on my iPhone’s settings?

No, the UDID is not available in the iPhone’s settings and can only be accessed via iTunes or third-party software.


In conclusion, knowing how to obtain the identifier number (UDID) for your iPhone is a handy skill, especially for those involved in app development or requiring specialized support. The process, while simple, involves a few steps and the use of iTunes.

Remember, the UDID is a powerful piece of information that should be shared cautiously and only with trusted sources to avoid potential misuse. Whether you’re a developer needing to register devices or a user seeking tailored support, the UDID is a key piece of the puzzle in enhancing your iPhone experience.